Found one <a href="https://duyet.github.io/llm-over-dns/" rel="nofollow">https://duyet.github.io/llm-over-dns/ and far from the only one since “X over DNS” is a deeply unoriginal idea <a href="https://hn.algolia.com/?dateRange=all&page=0&prefix=true&query=%22over%20dns%22&sort=byPopularity&type=story" rel="nofollow">https://hn.algolia.com/?dateRange=all&page=0&prefix=true&que... and trivial to code up.
Yes, the linked project does say they have a demo server at llm-over-dns.duyet.net. (I didn't bother to check whether it's still working.)
Edit: This particular demo server doesn't work. There's another LLM over DNS post from a year ago <a href="https://news.ycombinator.com/item?id=44813298">https://news.ycombinator.com/item?id=44813298 where the server seems to answer some queries but not others.
Edit 2: Actually the server in <a href="https://news.ycombinator.com/item?id=44813298">https://news.ycombinator.com/item?id=44813298 does work with queries like "what is the capital of france", I was querying with special characters like "what's" or "1+1". So yes there are people opening hosting these on the Internet.
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Edit: This particular demo server doesn't work. There's another LLM over DNS post from a year ago <a href="https://news.ycombinator.com/item?id=44813298">https://news.ycombinator.com/item?id=44813298 where the server seems to answer some queries but not others.
Edit 2: Actually the server in <a href="https://news.ycombinator.com/item?id=44813298">https://news.ycombinator.com/item?id=44813298 does work with queries like "what is the capital of france", I was querying with special characters like "what's" or "1+1". So yes there are people opening hosting these on the Internet.